The Horizon Playlist Series 2, dubbed ‘Horizon Decades’, will run from June 18 to July 16.Forza Horizon 6 developer Playground Games has revealed the next salvo of free content coming to the game in the Horizon Playlist Series 2. Series 2, dubbed ‘Horizon Decades’, will run from June 18 to July 16. Playground has confirmed 10 cars that will be available to …